LACK enclosure filament guide

After browsing countless filament guides for LACK enclosures and not finding precisely what I was after I decided to create my own.

My main goals were to produce an aesthetically pleasing guide while reducing the contact area and drag on the filament as much as possible.

I started with a simple venturi shape with wide openings top and bottom and a gentle radius to guide the filament.

I wanted the top guide to be neat since that is the side most people will see.

I also wanted the bottom guide to be nice and wide to soften the filament radius when the printer is at its uppermost Z-axis height.

I think this design achieved both.

My OpenSCAD code may not be the prettiest but I've included it here in case others wish to modify the design.

I printed a round top guide and an oblong bottom guide. It's not easy to tell from the pictures but the bottom is twice as wide as the top. This actually worked out about perfect for my needs.

To connect the top and bottom guides to